judgecorp writes: "Us customers for the top-end Amazon Kindle Fire will have to wait for FCC approval of the tablet's 4G radio. Formal FCC approval guarantees a device will not interfere with other machines. Amazon has taken the very unusual step of selling the tablet with FCC approval still pending, so delivery dates are uncertain. Sales of the Wi-Fi only version and sales in countries with no 4G networks should be unaffected."